Feeding mechanism for sewing-machines.



4 0 v 9 1 3 2 G U A D E T N E T A P QIIIIANLEY: FEEDING MECHANISM. FORSEWING MACHINES.

APPLICATION FILED OUT. 22, 1902.

4 sums-sum 1.

ZYZV6IZZ O7'" 6E. Haaile By his JZZorneg N0 MODEL.

I No. 768,328. PATENTED AUG. 23, 1904.

" G, E. HADLEY.

FEEDING MECHANISM FOR SEWING IVIACHIIIES.

APPLICATION FILED 00T.22, 1902. .NO. MODEL.

n ifneSses Inventor a Ifadley; ,Zy Z4? .flli qrney No. 768,328. IPATENTED AUG. 23, 1904. 0. E. HADLEY. FEEDING MECHANISM FOR-SEWINGMACHINES.

APPLICATION IILED'OOTJZ, 1902. I

no MODEL.

PATENT-ED AUG. 23, 1904,

G. E. vHADLEY. GHANISM FOR SEWING MACHINES.

APPLICATION FILED OOT. 22,1902.

FEEDING ME 4 SHEETS-SHEET 4.

N0 MODEL.

UNITED STATES Patented August 23, 1904.

PATENT OFFICE.

FEEDING MECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 768,328, dated August23, 1904. Application filed October 22, 1902. Serial No. 128,242. (Nomodel.)

, certain new and useful Improvements in Sewing-Machines, of which thefollowing is a full, clear, and exact description.

This invention relates to sewing-machines,

and more particularly to that class thereof employed for chain-stitchingand overseam blindstitching; and my invention hasv for its objectcertain improvements in the mechanism whereby the'functions of theseveral 0 operating parts may be carried out, such parts being adaptedand organized for adjustment relatively to but independent ofeach otherto produce the best results.

More specifically, my invention comprises a novel organization of thefeed mechanism comprising an actuating-lever operable longitudinallyand. vertically by independent devices in such a manner that while thevertical movement of the feed-dog may remain-con- I stant,. yet thelongitudinal movement of said dog may be regulated or adjusted asrequired to regulate the length of the stitch.

In connection with the vertical movement of the feed-dog my inventioncomprises means whereby the arc of said vertical movement may be variedin accordance with the thick-' ness of the material to be operated upon.

In the accompanying drawings, in which similar characters denote similarparts, Figure 1 is a side view of a sewing-machine constructed inaccordance with my invention, the side plate or cover being removed todisclose the interior of the frame. Fig. 2 is an end view of themachine. Fig. 3 is a section on line 3 30f Fig. 1. Fig. 1 represents acentral horizontal section of the machine, and

Fig. 5 is a detail view of the connection be,- tween thedrive-shaft andthe lever for actuating the feed-dog. Fig. 6 is an edge elevationthereof. Fig. 7 is a plan view to show the means'for adjusting thedrive-cams for the dog-actuating lever. Fig.8 is a side elevationthereof. Fig.9 is a cross-sectional view of Fig. 8 Fig. 10'is a detailperspective view of the rear end of the dog-actuating lever. Fig. 11 isa longitudinal section of the link connecting the feed-dog and theactuating-lever, taken on the line w a; of Fig. 1.

Before proceeding to describe the novel feed mechanism in detail adescription will be given briefly of the organized machine in which suchmechanism is comprised in an operative way and with which character ofmachine said feed devices are exceptionally well adapted forcooperation. 7

20 represents a frame having a bearing 21 for the driving-shaft 22,which is provided with the usual band-wheel 23 and fly-wh'eel 24:, saidshaft having its opposite ends journaled.

at 25 in the cover or front plate26. Said shaft has thereon a bevel-gear27, meshinga bevel-gear-28 on a right-angula'rly-arranged spindle 29, onwhich is a sleeve 30, constitut ing an eccentric driving member.

The needle 31 is carried by an arm 32, ad-

justably secured to the needle-bar 33, which is constituted by a shaftjournaled in the frame and has its oscillatory movement imparted theretoby the connection with its crank-arm 3 1 of the eccentric 35 on theaforementioned sleeve 30.

4L0 indicates the looper, which has an oscillatory and a reciprocatorymovement imparted thereto, the reciprocatory movement being imparted byan eccentric 41 on shaft 22, its strap 12 being connected to an arm 13.Passing through the arm 43 and rotatably mounted therein is a looper-bar4:6, shouldered at 47 and having a collar 48 at opposite sides of thearm &3, so that as the arm is reciprocated by the eccentric thelooper-bar will be moved endwise. The rear end of the looperbar 16 isslotted to receive the drive-shaft 22 I and form a slide 44, which worksin ways 45, provided upon the frame of the machine. The looper-bar'issquare in cross-section and plays in a sleeve 4E9, journaled in thebearing 50 and a hanger 51 of the frame 20. The os cillatory movement isimparted to the sleeve 49 by the eccentric 52, the strap of which isconnected to the arm 54:.

The novel feed mechanism will be now particularly described, it beingstated'that the same comprises an actuating-lever movable longitudinallyand also vertically, so, as to be cooperative with the presser-footmaintained stationary in juxtaposition thereto. The work-table is alsomovable vertically and is so organized that the extent of its movementmay be regulated for any thickness of material to be operated upon.

Referring first to the presser-foot 60, (see Fig. 2,) it has been statedthat this presserfoot is normally stationary during the operation ofstitching. On the other hand, means are provided for varying theposition of said presser-foot relatively to the needle, these meansconsisting, substantially, of an adjustable screw 61, rotatably held ina block or bracket 62, which may be secured to the head or frame of themachine in any convenient manner. The screw 61 is in engagement with acorrespondingly-threaded aperture 63 in the upper portion of thepresser-foot 60, so that the actual working surface 64 of said foot maybe closely regulated relatively to the needle 31, and consequently ablindstitch or an overseam may be performed on the machine as required.

Organized for cooperation with the presserfoot is a working table,denoted herein by and preferably angular in cross-section, so as to forma bend in the material to be operated upon and to afford to the needlean opportunity of performing its work properly. The table has, as abovestated, a vertical movement, the upward movement (toward thepresser-foot) being caused, preferably, by resilient means, shown hereinas a spring 71, interposed between the base of the frame and the plate72, secured to the under side of the bed or bar 73. This bar is shown ashaving an oscillatory movement around a fixed axis 74 in the frame, andthe upward movement thereof may be limitedas, for instance, by a nut 75in screw-threaded engagement with a stud 76, pivoted at 77 to the bar 73and passing through an ear 78, forming a part of the frame-while astop-nut 79 may be employed above the ear 78 to limit the downwardmovement of the bed or table 73 as the latter is depressed by anyconvenient means to receive the work to be operated upon.

The feed-dog 80 is preferably pivoted intermediate its ends, as at 81,so as to have a vertically-oscillatory movement of predetermined amount,while at the same time a longitudinal movement may be imparted to saidfeed-dog at the proper time. To this end the feed-dog 80 is pivotallysupported in a slide 82, supported in the table 70, to which alongitudinal movement may be imparted by an actuating-lever 83,pivotally supported on said slide, as at 84. The upper end of theactuating-lever 83 may be provided with a pair of horizontally-disposedribs 85, adapted to receive between them a block 86, which may serve asa wearing member for an eccentric 87, mounted upon the primary drivingmember 22 and preferably forming a part of the bevel-gear 27, abovereferred to.

Means are provided for imparting a vertical movement to the feed-dog 80,this movement being also accomplished by the lever 83, having anextension 88, connected with the feed-dog 80, preferably in a mannerindicated in Figs. 1 and 11, and comprising a link L, formed in twoparts 89 and 90, respectively, the former of which telescopes into thelatter, and the part 89 carries a collar 91, secured thereto by screws92, passing through a slot 93 in the member 90. (See Fig. 11.) Themember 90 of the link L is also provided with a collar 94, and a spring,such as 95, may be interposed between the collars 91 and 94:, thusforming a yielding connection between the lever 83 and the dog 80.

Means are provided whereby the are of vertical movement of the feed-dog80 may be varied without in any way influencing the amount of suchmovement, and for this reason ,1. preferably provide the link-section 89with a slot 96 to permit adjustment of the link L relatively to the arm88 of the lever 83, as will be readily understood, it of course beingunderstood that a set-screw is employed to adjustably connect the arm tothe link. The vertical movement of the dog 80 is in this case effectedby the movement of the arm 88 around the pin 84 as a fulcrum, the lever83 being provided at its rear end with a pair of projecting faces 97,adapted to receive between them a block 98, to which a reciprocatorymovement in said ways may be imparted by an eccentric 99, operativelyconnected with the primary driving member 22, but being organized tovary the throw thereof substantially in the manner as shown in Figs. 7to 9, inclusive. Here the eccentric 99 is shown as having a lateralprojection 100, fitting into a correspondingly-f0rmed groove 101 in theoccentric 87, so that the eccentric 99 may have a sliding movementrelatively to the latter, such movement being regulated by a screw 102in screw-threaded. engagement with the eccentric 99, but being rotatablewithout any endwise movement in the eccentric 87. It is of courseevident that the particular construction for effecting this adjustmentmay be varied as desired, the screw 102 being in the present instanceprovided with an annular groove 103, the walls of which engage a pin104, firmly held in the eccentric 87.

From this description it will be seen that while the timing of therespective operations will not be afiected in any way the eccentricityof the eccentric 99 relatively to the primary driving member 22 may beincreased or decreased, thus varying the longitudinal travel of thefeed-dog without affecting the rise or fall thereof.

Many changes may be made in the particular methods of effecting thevarious adjustments Without departing from the spirit ofmyinvention, andfor this reason I wish it distinctly understood that I do not confine.my-

self to the use of the specific construction of the several elementsas-hereinbefore described.

Having thus described my invention, what:

I claim, and desire to secure. by Letters Patent,.is

1. The combination with a table, a longitudinally-movable slide carriedthereby and a feed-dog pivoted to the slide, of an endwise bodilymovable actuating lever fulcrumed upon the slide and having a connectionwith the feed-dog to oscillate the same, and means for impartingreciprocatory and oscillatory movements-t the lever.

2. The combination with a table, a longitudinally-movable slide carriedthereby and a feed-dog pivoted to the slide, of an endwise bodilymovable actuating-lever fulcrumed upon the slide, and a yieldingconnection between said lever and feed-dog to oscillate the latter, andmeans for imparting reciprocatory and oscillatory movements to thelever.

3. The combination with a table, a longitudinally-movable slide carriedthereby and a feed-dog pivoted to the slide, of an endwise bodilymovable actuating-lever fulcr'umed upon the slide,-means for operatingthe lever,

means for adjusting the endwise movement of the lever to vary 'thelongitudinal movement of the feed-pawl, and means connecting the leverand pawl for varying the arc'of the pivotal movement'of the latter.

4. The combination with a table, a slide carried thereby and a feed-dogpivoted to the slide, of anendwise bodily movable actuatingleverfulcrumed upon the slide, a link connection between one end of theleverand the dog, adrive-shaft, a cam embodying a member fixed upon theshaft and a slidable member carried by and adjustable in an endwisedirection across the fixed member, and a strap connection between thecam members and the lever.

5. The combination with a table, aslide car-' ried thereby, andafeed-dog pivoted to the slide, of an endwise bodily movableactuatinglever fulcrumed upon the slide, a link connection between oneend of the lever and the dog, a drive-shaft, a cam embodying a memberfixed upon the shaft and provided with a lateral groove, and a slidablemember having a projection engaging the groove, an adjusting-screw uponthe fixed member and engaging a screw-threaded part of the projection onthe slidable member, and a strap connection between the cam membersandthe lever.

6. The combination of a table, a slide carried thereby, a feed-dogpivoted to the slide,

an endwise, bodily-movable, actuating-lever fulcrumed-upon the slide, atelescopic, springpressed connection between the lever and-the dog, andmeans for reciprocating and oscillating thelever.

7. The combination of a table, a-.slide carried thereby, a feed-dogpivoted. to the slide, an endwise, bodily-movable, actuating-leverlinks, and a helical spring embracing one of the links and bearingagainst the shoulders.- I

8. The combination of a table, a slide carried thereby, a feed-dogpivoted to the slide, an endwise, bodily-movable, actuating-leverfulcrumed upon the slide, means for reciprocating and oscillating thelever, and a link pivotally connected to the dog and having an inopposite directions an endwise-adjustable connection with the lever.

Signed by me at New York, N. Y., in presence of two subscribingwitnesses.

. CHARLES E. HADLEY.

